Hollow plug



FIG. 1 is a rear perspective view of the hollow plug present invention;

FIG. 2 is a front perspective view of the invention shown in FIG. 1;

FIG. 3 is a side elevational view of the invention shown in FIG. 1;

FIG. 4 is a top view of the invention shown in FIG. 1;

FIG. 5 is a front end view of the invention shown in FIG. 1; and,

FIG. 6 is a rear end view of the invention shown in FIG. 1.

The claimed design and illustrations shown in the drawings depict a hollow plug. 

CLAIM The ornamental design for a hollow plug, as shown and described. 